Hello.
I designed our product by applying AD5111 (10K, Up/Down).
It worked normally once or twice, but it is currently fixed at A-W 45 ohm and W-B 9.8K ohm, and does not respond to any commands.
Sometimes when power is applied again, it becomes A-W 9.8K ohm, W-B 39 ohm.
The strange thing is that the resistance of A-B is measured around 9.8K.
Judging by the resistance value, it doesn't seem like a malfunction. What's the problem?
PS - Of course, other AD5111s are operating normally when tested by connecting them to the same signal port.
Thanks in advance for your kind reply.
Hi, vsethia.
Thank you for your kindness.
I answer your question as follows.
1. Please share the circuit diagram and the power supply sequencing details.
-> Power is supplied directly from AD/DC 5V power.
The sensor signal(A/sens_2, W/sens_1, B/sens_3) connection is controlled using the photo relay (control line SW_COMP_VDIV-FCC).
(Of course, SW_COMP_VDIV-FCC is maintained High level at initial and normal.)
Can the power supply sequencing have a critical effect on the behavior of a part?
2. Does the part respond to U/D state?
-> In U/D state, parts do not respond.
